angular - 回车键是否触发点击事件？

Question

在下面的代码中，removeSelectedCountry() 应在单击 span 元素时调用，handleKeyDown($event) 应在单击时调用div 上有一个 keydown 事件。

@Component({
    selector: "wng-country-picker",
    template: `
    <ul class="CountryPicker-selected" *ngIf="selectedCountries.length > 0">
    <li *ngFor="let country of selectedCountries">
        <span class="Pill Pill--primary" (click)="removeSelectedCountry(country)">
        {{ country.name }}
        </span>
    </li>
    </ul> 
    <div (keydown)="handleKeyDown($event)" class="CountryPicker-input"></div>
`,
providers: [CUSTOM_VALUE_ACCESSOR]
})

但每次按下 Enter 键时都会调用 removeSelectedCountry()。

为了使代码正常工作，我必须将 click 事件更改为 mousedown 事件。现在工作正常。

谁能解释一下为什么 Enter 键会触发 click 事件？

@Component({
    selector: "wng-country-picker",
    template: `
    <ul class="CountryPicker-selected" *ngIf="selectedCountries.length > 0">
    <li *ngFor="let country of selectedCountries">
        <span class="Pill Pill--primary" (mousedown)="removeSelectedCountry(country)">
        {{ country.name }}
        </span>
    </li>
    </ul> 
    <div (keydown)="handleKeyDown($event)" class="CountryPicker-input"></div>
`,
providers: [CUSTOM_VALUE_ACCESSOR]
})

添加类片段:

export class CountryPickerComponent {

private selectedCountries: CountrySummary[] = new Array();

private removeSelectedCountry(country: CountrySummary){
    // check if the country exists and remove from selectedCountries
    if (this.selectedCountries.filter(ctry => ctry.code === country.code).length > 0)
    {
        var index = this.selectedCountries.indexOf(country);
        this.selectedCountries.splice(index, 1);
        this.selectedCountryCodes.splice(index, 1);
    }
}

private handleKeyDown(event: any)
{
    if (event.keyCode == 13)
    {
       // action
    }
    else if (event.keyCode == 40)
    {
        // action
    }  
    else if (event.keyCode == 38)
    {
        // action
    }    
}

Answer 1

对于 ENTER 键，为什么不使用 (keyup.enter):

@Component({
  selector: 'key-up3',
  template: `
    <input #box (keyup.enter)="values=box.value">
    <p>{{values}}</p>
  `
})
export class KeyUpComponent_v3 {
  values = '';
}